# -*- coding: cp936 -*-

import arcpy

import os

import ylpy

import random

def main():

    num=ylpy.getCount(inFeature)

    n=int(num*mscale/100)

    ylpy.clearselect(inFeature)

    A=random.sample(range(num),n)

    FID=ylpy.getOIDField(inFeature)

    sql=str(FID)+" in ("

    for i in range(0,n):

        sql=sql+str(A[i])

        if i<n-1:

            sql=sql+","

    sql=sql+")"

    arcpy.Select_analysis(inFeature,outFeature,sql)

inFeature = arcpy.GetParameterAsText(0) #

mscale = arcpy.GetParameter(1) #

outFeature = arcpy.GetParameterAsText(2) #

try:

    main()

    #arcpy.SetParameterAsText(3, inFeature)  # Is polygon

except Exception, ErrorDesc:

    arcpy.AddError(u"gisoracle错误："+str(ErrorDesc))